function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Majka, Christopher G.', 1],
    ['Mitter, Heinz', 1],
    ['Mitter, Heinz & A, Upper', 1],
    ['Otto, Robert L.', 17],
    ['Otto, Robert L. & Karns, Ken D.', 3],
    ['Otto, Robert L. & Muona, Jyrki & Córdoba-Alfaro, Jim', 2],
    ['Stefanelli, Silvia & Della Rocca, Francesca & Bogliani, Giuseppe', 2],
    ['Vahtera, Varpu & Muona, Jyrki & Linna, Ari', 2],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);